J9Q4,] ASELLOTA-GROUP OP CRUSTACEANS. 325 



the male, its lower pi'ocess small. Hand much, smaller than in 

 the male, subtriangular, a little more than half as long again as 

 deep ; upper margin very convex, two and a half times longer 

 than the lower, which is sti'aight, with many long hairs ; distal 

 end somewhat longer than the lower margin ; palmar edge feebly 

 convex, with an angular notch at the lower end, so that the usual 

 spine, which is strong and moderately long, is situated a little 

 behind the edge; the edge from the "claw" to the notch is 

 occupied by five or six saw-teeth gradually increasing in size 

 downwai'ds, and besides adorned with some stift' setse pectinate 

 along their upper margin ; finally, the angle between lower margin 

 and palmar edge measures about 110°. Seventh joint with the 

 claw regularly claw-shaped, when extended reaching slightly beyond 

 the notch mentioned ; the major portion of the lower margin of 

 the joint is adorned with rather slender spines, serrate along the 

 lower margin, and some fine hairs. 



Abdominal shield slightly broader than long ; lateral margin 

 unarmed, only with the usual tooth and notch at the end ; 

 posterior margin, reckoned from the notch, is strongly and rather 

 evenly curved. 



Uropoda considerably more than half as long as the abdominal 

 shield ; exopod slightly longer than the sympod and much shorter 

 than the endopod. 



Second joint of the endopod of second male pleopoda with the 

 distal half considerably broader than near the base, the end very 

 obliquely rounded, the lower surface at the end set with numerous 

 very short hairs. 



Length. — Both sexes similar in this respect, measuring about 

 3*3 mm. 



Occurrence. West Indies : St. Thomas. Several specimens, 

 among which five adult males, were taken, 12.11.1888, by H. Kia3r, 

 Captain in the Danish ISTavy. 



Remarks. In the outline of the head, the position of the eyes, the 

 short third joint in the antennular peduncle, the first pair of legs, 

 and, above all, in the shape of the hand in the male, this form 

 differs abundantly fi-om the preceding species ; it is closely allied 

 to the two following species, and the difl[erences are mentioned 

 below. 



7. Stenetrium stebbingii H. Richardson. 



1902. Stenet7'ium stebhingi Harriet Richardson, Trans, Conn. 

 Acad. vol. xi. p. 295, pi. xxxix. figs. 46-49. 



Of this species I have seen no specimens. According to the 

 description and the figures published by Miss Richardson it is 

 very closely allied to S. occicleiitale and S. antillense, but the 

 figures representing the first thoracic leg in male and female 

 show some differences which I hope really exist, and if so, they 

 are sufficient for the separation of this form from S. occidentale 

 and S, antillense. 



The figure showing the head with antennulse and four proximal 



